Vacuum furnace cleaner



Dec. 5, 1933. H, SCHREIBER 1,937,792

VACUUM FURNACE CLEANER Filed Sept. 19, 1932 i 1 16 if i 22 i 12 if 17 ,14

ATTO RN EYS r Patented Dec. 5, 1933 I UNIT-semi" VACUUIW FURNACE CLEANER,

Harry Schreiber, Detroit, Mich.

Application September 19, 1932 .S-erial No. 633,830

2 Claims. (01. 183--60) The object of the present invention is to provide a vacuum cleaner, particularly for furnaces, of such small size that it may readily be carried into the basement; Such a cleaner is more eco- 51 nomical to build and operate than the present types which are usually mounted on a truck and are connected to the furnace by a length of hose which obviously reduces the efficiency through friction losses and leaks. In the present case, on

the other hand, it is contemplated to place the cleaner close to the furnace so that only a short length of hose is necessary.

A further object of the invention is to provide such a cleaner of exceedingly simple and inex- -5 pensive construction. Among other novel me= chanical features, the device of this invention contains a contrivance for scraping dust and soot off the inner wall of the filter bag, so that a clear suction path through the filtering medium may" at all times be maintained. Further this contrivance is operablefrom the exterior of the device without requiring opening or dismantling of the device. 1

' The invention is fully disclosed by way of ex- .1 ample in the following description and in the accompanying drawing, in which-- Figure 1 is an elevation of the device;

Fig. 2 is a vertical section on the line 2-2 of Figure 1;

Fig. 3 isa plan section on the line 33 of Figure 2;

Fig. 4 is an elevation, partly in section, of a modified construction;

Fig. 5 is a vertical section of a modified form of scraper, and

Fig. 6 is a plan view thereof.

Reference to these views will now be made by use of like characters which are employed to designate corresponding parts throughout.

The device is built mainly within a cylindrical casing l which is preferably mounted on casters 2 for portability. The bottom of the housing 1 is extended at 3 to support an electric. motor 4 for driving a blower 5 which has its intake 6 .in communication with the housing 1.

A screen 7 is mounted concentrically within the housing, preferably resting on the bottom thereof. 0n the bottom of the housing and within the screen 7 is mounted an inner base structure 8. A filter bag 9 has its upper end secured between the upper edge, of the housing 1 and the cover 10 thereof, and the lower closed end of the bag rests upon the base structure 8 as clearly shown in Figure 2. An air tight gasket 11 is also fitted between the housing 1 and its cover 10, and the coveris securely held down by suitable latches 12 such as hood fasteners.

A boss 13 is fitted in the cover 10 and is adapted to have an intake line attached thereto. The line is adapted to be extended to the point where the cleaning operation is to be performed, such' as the interior of a furnace, and preferably has its free end equipped with a suitable nozzle and a brush or scraper (not shown) for loosening the soot. The lower end of the boss 13 is formed with a flange 14 over which is disposed a rotatable disk 15 having aball-bearing support 16 on the flange. The disk 15 is a part of a frame which further includes downwardly diverging arms 1'? and a ring 18 at the lower ends of the arms. A cylindrical. screen 19 is suspended from the ring 18 in contact with the inner wall of the filter bag '7, whereby bag may be scraped or cleaned on rotation of the frame and screen by the means presently to be described.

The operating means for the frame consists merely of a rod 20 pivotally attached as at 21 to the disk 15 at an outward point thereof and passed through a bushing 22 in the cover 10. The inner screen. 19 is oscillated on its vertical 30 axis by reciprocation of the rod 20 which is provided with an external handle 23.

inner container 24 is preferably seated in the bottom of the bag 9 and within the inner screen 19. Thus, in cleaning a furnace, any sharp, heavy particles or hot coal or ashes that may be drawn through the suction line fall into the container 24 and are thus prevented from tearing or burning the screens and the filter bag. The speed of the motor 4 for operating the blower 90. may be regulated by means of an adjustable rheostat 25 mounted on the housing 1. The blower unit may be used in connection with a paint gun or spraying apparatus by connecting the air lines of such device to the exhaust fitting 26 of the blower. i

In the modification shown in Figure 4, the casters are dispensed with, and the housing 1' is mounted on a perforated or open base structure 2'7. The motor blower 29 are mounted within this structure on a vertical axis, and the intake 30 of the blower is extended through the bottom of the housing. This construction is especially suitable for li ht machines that may be carried manually, and accordingly a ball 31 is attached to the upper end of the housing, or the 2'? may be mounted on casters if desired.

In Figures 5 and 6 is shown a modified form of scraper for the bag and also the details of the 0 scraper rod which have already been described.

The inner screen of Figures 1, 2 and 3 is here replaced by a series of vertical brushes 32 depending from the frame ring 18. The lower ends of the brushes are attached to a ring 33 of the same diameter as the ring 18'. The brushes are detachably secured to the rings 18 and 33 by screws 34, so that a worn brush may readily be removed and a new brush attached. If four brushes are provided, as illustrated, the filter bag may be scraped by turning the frame through an angle of 90. Obviously, more brushes may be provided if desired.

Although specific embodiments of the invention have been illustrated and described, it will be understood that various alterations in the details of construction may be made without departing from the scope of the invention, as indicated by the appended claims.

What I claim is:

1. A vacuum cleaner comprising a housing having air exhaust means, a hollow boss in the top of said housing constituting an air inlet and adapted for connection to an air hose, a filter bag in said housing, a flange on said boss within said housing, a scraping device rotatably suspended from said flange and engaging said bag, and means for turning said device.

2. A vacuum cleaner comprising a housing having air exhaust means, a hollow boss in the top of said housing constituting an air inlet and adapted for connection to an air hose, a filter bag in said housing, a flange on said boss within said housing, a frame suspended from said flange and having a ball bearing mounting thereon, a scraping device carried by said frame and engaging said bag, and means for turning said device.

HARRY SCI-IREIBER. 

